Regenerating-exhaust



(No Model!) A. SAR.

. REGBNBRATING EXHAUST. N0. 396,713. Patented Jan. Z2, 1889.

@ nllggla@ ot' the motor-engine.

UNITED 'STATES PATENT ALBERT SAUER, OF PITTSBURG, PENNSYLVANIA.

REGENERATING-EXHAUST.

SPECIFICATION forming part of Letters Patent No. 396,713, dated January 22, 1889. Application filed March 19, 1888. Renewed December 20, 1888. Serial No. 294,246. (No model.)

To aZZ whom it' may concern:

Be it known that l, ALBERT SAUER, of Pittsburg, .in the county of Allegheny, State of Pennsylvania, have invented certain new and useful Improvements in Regenerating-EX- hausts, of which the following is a specification.

This invention relates to an improved attachment for steam-generators by which the exhaust-steam is sucked off from the exhaust side of the piston o'l. the motor-engine, reheated, mixed with live steam of high. press` ure, andresupplied to the motor-engine; and the invention consists of an attachment to steam-generators which located in the steam-dome of the generator and connected by a live-steam pipe with the supply-pipe and by a second pipe with the exhaust-pipe The inner end of the exhaust-steam pipe is provided with a checkvalve and inclosed by a casi ng having a nozzle that is surrounded by a second concentric nozzle which receives live steam and serves to suck in the exhaust-steam and mix it with the live steam. The exterior nozzle is connected by a bent pipe and stuffing-box with the live-steam pipe, the bent pipe being provided with means for adjusting the exterior nozzle toward the nozzle of the exhaust-pipe, so as to regulate the supply of live steam according to the speed ot the engine.

The accon'ipanying drawing represents a vertical section ot' my improved attachment to steam-boilers.

A represents a steam-boiler ot any approved construction, and B the steam-dome ot the same, in which dry steam of the required high pressure collected. A pipe, C, is connected with the exhaust-pipe and alive-steam pipe, D, with the supply-pipe of a steam-engine. The eKhaust-pipe C terminates at the inside of the dome A, and is provided with a check-valve, C, which is guided in a suitable manner at the interior of a casing, C2, that incloses the end of the exhaust-pipe and its check-valve. The casing (i12 is provided with a conical nozzle, Cwhich is surrounded by an exterior concentric nozzle, E, which latter is connected by a bent pipe, E, with the livesteam pipe D. A stuiiing-box, E2, forms the connection ot the bent pipe E with the livesteam pipe D and permits the adjustment of the former toward the livesteam pipe D. To the bent pipe E is swiveled a screw-post, e, which passes through a screw-nut, e, at the top ot the steam-dome, and is provided with an upright adjusting-lever or hand-wheel, e2, at the outer end, so that the nozzle E can be adjusted nearer to or away from the nozzle C3 for starting and stopping the engine and for regulating the quantity of live steam that passes from the dome to the engine.

When the engine is stopped, the pressure of the steam in the dome B closes the checkvalvc C of the exhaust-pipe C and interrupts the action of the injector, which is formed by the nozzles C3 and E. Vhen the engine is started, the steam passes through the space between the nozzles C3 and E, creates a vacuum in the interior nozzle, opens the checkvalve, and exerts a continuous suction on the exhaust side of the piston, so as to draw the exhaust-steam into the nozzle C2, and thence, by theinjector action of the nozzle E, into the bent pipe E, where it is mixed with live steam of high pressure, reheated in its passage through the bent pipe E', and resupplied with the live steam to the engine. In this manner the exhaust side of the piston is relieved of any back-pressure, and thereby a more effective working of the steam-engine and a considerable saving in the use ot steam obtained. Having thus described my invention, l claim new and desire to secure by Letters Patent# l. The combination, with the dome of a steam-generator, ot' an injector locatedin said dome, a live-steam pipo connecting the discharge end of the injector with the motor-engine, and an exhaust-pipe connected to the suction end of the injector and provided with a check-valve, substantially as set forth.

2. The combination, with the dome ot a steam-generator, ot' an exhaust-pipe terminating at the outside ot said dome, a check-valve at the end of the exhaust-pipe, a casing surrounding the valved end oi' the exhaust-pipe, 4

steam-generator, of an exhaust-pipe termin ating' inside of said dome, a Cheek-valve at the end of said 'exhaust-pipe, a easing surrounding the valved end of the exhaust-pipe, said oasingbeing provided with a conical exhan nozzle, a second nozzle surrounding the exhaust-nozzle, a bent pipe applied to the nozzle, a live-Steam pipe having' a Stuffing-box for the end of the bent pipe, and lneans for Io adjusting the bent pipe and exterior nozzle,

so as to increase or decrease the supply ot' live steam to the saine, substantially as set forth.

In testimonyv that I claim the foregoing as my invention I have signed my naine in pres- 15 ence of two subscribing witnesses.

- ALBERT SAUER. Witnesses:

PAUL GOEPEL, JOHN A. STRALEY. 

